New Languages/Authors
If you are a new author of a new language simply post your localization file on the forum so it can be validated by the community, then I'll set you up with an account to make changes directly to procon.

How will the changes go into procon?
In 0.3.5.0 these files will be automatically downloaded by procon when it checks for updates. You can submit changes at any time without worrying about procon releases, procon will automatically download your localization changes provided the user has "Check for updates" enabled.

Each procon release will ship with any files uploaded at the time of release.

Other ways to submit
No submissions on the forums or codeplex will be accepted after I have pm'd each author with their username/password and this alternative is proven viable. Sooo.. no more emailing, pming, codeplex pushing, forum hunting, thread finding, localization key missing... ahhh bliss

Re: How to submit your localization files in 0.3.5.0+

nah 0.3.4.0 won't download the latest versions. I'm waaay overhauling the whole update process because it's borked at the moment. I'm trying to make it so when I fix problems or implement features everyone else will be able to use them within 10 or so minutes of it being finished and tested.. smaller updates.

I'm also home for the weekend so I've got some time up my sleeve to sort it all out.